Which risk increases most when grout encapsulation fails around prestressing tendons within a concrete box girder?

💡 Explanation

Tendon corrosion is accelerated because when grout encapsulation fails, the electrochemical process of **galvanic corrosion** is enabled due to moisture and chloride intrusion. Therefore, tendon cross-section is reduced, rather than a shear failure, carbonation effect or live-load immediately compromising the structure.

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